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CHARLES M.l DIABOLL, OF IONDON, CONNECTICUT.

Laim Patent No. 80,812, dated August 11, 186s.

IMPROVEMENT IN DRILL-STOCK. i

TO ALL PERSONS T0 WHOM THESE PRESENTS MAY COME:

` Bo it known that I, Cnsanns M. DABoLL, in the city and county of New London, and State of Connecticut,

have invented a. new and useful Improvement in the Breast-Drill Stock; and do hereby declare the same to be fully described in the following specification, and represented in the accompanying drawings, of Which- Figure 1 is a top'view, and

Figure 2 a longitudinal section oi' my improved breast-drill stock.

In the drawings, A denotes what I term the stationary spindle of the stock, it being provided at one end with a curved rest or bearer, B, which, when the implement is inuse, is placed against the breast or front of the body of the user, he so holding it by seizing a handle, a, which projects at right angles from the spindle A'. The said spindle has ajournal, b, projecting from its other end, and having a diameter less than that of the spindle, such journal being for the support ofa tubular shaft or bit-spindleLC, which, at its outer end, is provided with a socket, cZ, to receive the shank of a bit.,` The spindle C is open at its other end, and has a bevelled pinion, c, fixed to it. Furthermore, thejournal b, which is encompassed by the bit-spindle, or which enters it in manner as represented in' the drawings, has a groove, o, cut transversely around it to receive the end of a screwks, which is screwed into the bit-spindle, and, with the groove,`serves to keep the said spindle in connection with its journal.

A bevelled Wheel, e, arranged so as to be supported and be capable oi' being revolved on a journahf, extending from the spindle A, and provided with a crankV or handle, g, extended from it, as represented in the drawings, engageswitb the gear or pinion o. y

A screw, h, screwed into the bitspindle,so as to enter the socket thereof, and arranged in manner as represented, serves to fasten a bit in such socket. I would remark that the end ofthe journal rests against the eiid' of the bore, z', of the bit-spindle.

The spindle A has a chamber, 7c, made lengthwise in it, and opening through the restB, or into aconcave recess, Z, Vformed therein, such recess being to receive theentire head of a screw-plug, m, which is screwed into the mouth of the chamber le, The recess prevents the head of the screw from injuring the breast of a person or being uncomfortable to him while the implement is in use. The chamber in the spindle A is for holdingVa -series of drills or boring-tools of di'erent sizes, such as may be adapted for use in the socket of the spindle C.

By my mode of applying the rotary bit-spindle C to the main spindle A, viz, by ajournal t extendfrpm the latter into the'former, I obtain a firm and durable seat or shoulder near the pinion, and also a seat at the terminus'of the journal, such journal, in consequence ofits length, constituting a. rm and true support for the drill orbit-shaft to revolve upon.

The drill-chamber or pocketin the stoel: will be found of-much convenience for the purpose for which it is intended.

-In using the implement, one hand hold of the handle is to be employed in supporting the bearer against theA breast of the user, whose other hand, applied to the crank of the bevelled wheel, is to impart rotary motion to the shaft c by putting the bevel-Wheel in revolution on its journal. I

I am aware that none of the parts of the apparatus herein described, considered separately, are new, and that, to a very considerable extent, their combination, even, is not new. I do not, therefore, claim the parts separately, nor the combination of them; but

The arrangement of 'the several parts, as herein described, the rest B, pocket lc, and flanged plug m, being included in said arrangement.

CHARLES M.v DABOLL.

Witnesses:

EDWIN Aucune, E. T. BROWN. 

